Gear-shaping machine.



E. R. FELLOWS.

GEAR SHAPING MACHINE.

APPLICATION FILED MAY 1, 1908.

Patented June 41,1912.

10 SHEETS-SEEET 1.

IIIIII Wmemea.

-E. R. FELLOWS.

GEAR SHAPING MAQHINEx APPLIOATION FILED MAY 1, 1902.

Patented June 41:, 1912.

10 SEEETSSHEET 2.

walk! E. E. FELLOWS.

GEAR SHAPING MACHINE.

APPLICATION FILED MAYl, 190B. 1 w g ggg gqgg Patenteo. Jun a i912.

' 10 SHEETSSHEET 3. -52

E. R. FELLOWS.

GEAR SHAPING MACHINE APPLICATION FILED MAY 1, 1908.

1L figg gaj g Patwtefi. 311116 41-, W12.

10 SHEETSSHEET 4.

E. R. FELLOWS.

GEAR SHAPING MACHINE.

APPLIUA'IIOII FILED MAY 1, 190B.

Patented June 4, 1912.

10 SHEETSSHEET 5.

lnvezzwr e M4 (9 U? l s.

E. R. FELLOWS. GEAR SHAPINGMAOHINE.

APPLICATION FILED MAY 1, 1908.

Patented June4, 1912.

10 SHEETS-SHEET 6 E. R. FELLOWS.

GEAR SHAPING MACHINE.

APPLICATION FILED MAY 1, 1908.

Patented June 4, 1912.

10 SHEETS-SHBET 7.

E. R. FELLOWS.

GEAR SHAPING MACHINE.

APPLIIGATION FILED MAY 1, 1908.

Patented June 4', 1912.

10 SHEETSSHEET 8- B. R. FELLOWS.

. GEAR SHAPING MACHINE.

1 APPLICATION FILED MAY 1, 1908.

33 Patented June 4, 1912.

10 SHEETS-SHEET 9.

I9 M L mm OM L D. L m Eml FP PMW R Emu u 7GP P Patented June 4, 1912.

10 SHEETS-SHBET10.

witnesses waw (52 G EDWIN R. FELLOWS, OF SPRINGFIELD, VERMONT, ASSIGNORTO THE FELLOWS GEAR SHAPER COMPANY, OF SPRINGFIELD VERMONT, ACORPORATION OF VERMONT.

GEAR-SHAPING MACHINE.

To all whom it may concern.

Be it known that I, EDWIN R. FELLOWS, of Springfield, in the county ofWindsor and State of Vermont, have invented certain new and usefulImprovements in Gear- Shaping Machines, of which the following is aspecification.

This invention relates to machines for making spaced cuts upon metalblanks to form gears or racks Its object is to provide a gear-cuttingmachine by which a gear or rack may be automatically completed by eithera single series of cuts or by a double series, by which first roughingand subsequently finishing cuts are made.

Broadly the invention embraces the application to any gear orrack-cutting machine, of mechanism by which a cutter and blank arerelatively moved so as first to pr0- duce a series of required to make afinished gear, and subsequently to make a series of finishing cuts inwhich the small amount of material left after the roughing cuts havebeen made is removed.

The invention further embraces the provision of a construction by whichthe gear may be made by a single series instead of two series of cuts.

In its preferred embodiment, which is the one herein illustrated anddescribed, the invention is applied to a machine which generates theteeth upon blanks by means of a planing cutter having gear-shaped teeth,such as the machines illustrated and described in the patents granted tome March 30, 1897, and June 11, 1901, numbered 579,708 and 676,227,respectively. In its application to machines of this character theinvention specifically includes mechanism for feeding the cutter andblank relatively to each other, to give the requisite depth to eitherthe finishing or roughing cut, and then relatively moving the cutter andWork laterally to cause the formation of a series of cuts around thelatter. This mechanism includes automatic devices for disabling thedepth feed when a sufiicient depth for the roughing and finishing cutshas been secured, and automatically arresting the lateral feed when thefinal cut has been finished, such mechanism being illustrated in detailin the a ccompanying drawings.

Figure 1 represents a vertical elevation, partly in section, of themachine. Fig. 2

Specification of Letters Patent.

Application filed May 1, 1908.

grooves of less depth than of Fig. 3.

Patented June 41, 1912. Serial No. 430,392

represents an end elevation, as seen from the right, of Fig. 1, showingparts of the mechanism in section. Fig. 3 represents a front elevation,on an enlarged scale, of the bracket carrying the principal parts of thefeed mechanism. Figs. 4: and 5 represent, respectively, a rear elevationand an end elevation, as seen from the right of F ig. 8, of the samebracket. Figs. 6 and 7 are views similar to Fig. 5, but with partsbroken away to show details of the feed mechanism. Fig. 8 is a similarview showing the parts in a different position. Fig. 9 is a verticalcentral section of the mechanism shown in Fig. 8. Fig. 10 is across-section, taken on the line 10-10 of Fig. 9. Fig. 11 is a detailelevation of the feed-pawls. Fig. 11 is a detail view of a device forgoverning the throw of the timing pawl. Fig. 12 is a view similar toFig. 8, showing the mechanism' in the position it occupies at the end ofthe roughing cut. Fig. 13 is a vertical axial section of the parts shownin Fig. 12, in a diiferent position. Figs. 14 and 15 are, respectively,a detail section and elevation of the locking pin and clutch for thedepth feed nut. Fig. 16 is a view similar to Fig. 12, showing the partsin the position they occupy upon the completion of the gear. Fig. 17 isa vertical section of the mechanism which causes operation anddisconnection of the rotary feed. Fig. 18 is a diagrammatic plan view ofa portion of the mecha-- nism. Fig. 19 is a sectional view showing theparts represented in Fig. 18, but in a different position. Figs. 20 and21'represent, respectively, axial and cross-sections of the locking pinfor the depthfeed nut. Fig. 22 represents a section on the line 22-22Fig. 23 represents a rear elevation of a warningbell; and Fig. 24 anunder i plan view of the warning-bell.

Like reference letters represent the same parts in all figures.Referring to the drawings,-1 represents a supporting base on which ispivoted a work-carrier 2, having bearings rotatively holding awork-spindle 3, on which blanks i from which and clamped.

5 is the cutter which is held in a saddle 6, and is reciprocatedrelatively to the blanks in the line or its axis, which is also parallelto the axis of the blank-holder.

7 represents a drive-shaft, from which mogears are to be made are placedtion is communicated by belt to a cone-pill ley 8, carrying a planetarygear 9 in mesh with two gears 10 and 11, respectively, of

i which the former is keyed to shaft 12 and ing a worm wheel 201 securedto the cutter spindle 202. Reciprocating movements are given to thecutter from the drive shaft 7 through a crank 203 on the latter, anextensible rod 204 pivoted to the crank and carrying a rack bar 205, anda pinion 206 meshing with said rack bar and mounted v on a rock shaft207 which has a gear connection with the slide in which the cutterspindleis journaled this mechanism being substantially the same as thecorresponding construction illustrated in my Patent No. 676,227, towhich reference may be had for a complete explanation thereof.

25 represents the depth feed screw and 26 the nut which operates thesame, being constructed substantially as described in the patentaforesaid, and operating to feed the v cutter radially toward thework-spindle to produce a cut of the necessary depth in the work.

' The elements for eflecting the objects. of the present inventionconsist of the mechanism for operating the depth feed nut, a

timing disk 28, means for rotating the same,

and the mechanism by which at the proper time the nut-operatingmechanism and timing disk operating mechanism are simultaneouslyconnected and disconnected respectively. The depth feed nut' isintegrally connected with a gear 29, with which meshes a pinion 30 uponthe same shaft 31 with a ratchet-wheel 32 which may conveniently becalled the depth feed ratchet, while the timing disk is operated by asimilar ratchet 33 which may be called the timing ratchet. The latter isconnected, through a shaft 34 and pinions 35 and 36, with a shaft 37carrying a'pinion 38 in mesh with a gear 39, which is either integralwith or rigidly connected to the timing disk 28. Pawls 40 411are mountedadjacent the ratchets 32 and33, respectively,

I ;-and are carried by-oscillating pawl-carriers,

the first-named pawl being mounted upon a carrier 42, which is connectedby means of the rod 43 with an eccentric strap 44 surrounding aneccentric 45 on'the drive-shaft '7, .Aswill be readily seen, eachrotation of the shaft ives the pawl one impulse, and,-

when the atter is in operative engagement with the depth feed ratchet,moves the ratchet slightly and turns the feed nut 26 by the describedmechanism, thus moving the cutter a short distance over toward thework-spindle. The pawl-carrier 46, upon which the other pawl 41 ispivoted, has a connection consisting of link 47 and lever-arms '48 49,mounted upon a rock-shaft 50, with a cam 51 upon the worm-shaft 22.

Thereby the worm shaft not only engages the index wheel 24 and gives'theblank its.

rotary feed, but also actuatesthe'timing ratchet pawl.

It is essential that only one of the pawls above described should be inoperation at the same time, and, accordingly, there is provided aconnection for moving one out of engagement with its ratchet when theother is placed inoperative relationwith its respective ratchet. Thismechanism consists of a gear-segment 52, .rotatably mounted upon thepivot 53 of pawl 40, and having a pin 54 which is adapted to engage apin 55, projecting from the pawl, when the gear-segment is turned towardthe left, and thereby elevate the toe of the pawl so that it cannotengage the teeth of ratchet 32. A link 56 is pivoted at one end to thegear-segment and at its other end has a notch or slot into whichprojects a stud 57 mounted upon the timing pawl 41. When the segment 52is rotated toward the right, the link is caused to bear upon stud 57 andelevate the toe of pawl 41 out of engagement with its ratchet, pawl 40being then free to drop into engagement with ratchet 32. And when thesegment is turned in the opposite direct-ionto disconnect pawl 40, pawl41 is free to drop into engagement with ratchet 33. segment 52 there-isprovided a cotiperating gear-segment 58 mounted upon a rock-shaft F oractuating 59, the other end of which carries an arm 60, having aprojection 61, which is normally held in engagement with the peripheryof the timing disk 28 by-means of a weight 62 connected to segment-52. I

When a blank is to be cut, andbefore the operation has actually beencommenced, the

timing disk, depth feed mechanism and ac-" tuator's therefor'are intheposition'shown in Figs. 6' and 7, pin 61 being close to the rim of thetiming disk, and the timing pawl being thereby held out/of operativeposition, while the depth feed pawl is in position to engageits ratchet.;.Upon the machine being. set in operation, the depth feed pawl is oscillated, and ratchet32 moved step-by-step to turn the feed nut and movethe cutter (0+ ward the work, When the gear 29 on thef being therebyheld out of operative position,

shown in Fig. '8, a springpm 63 upon the gear has engaged a dog-64'onflthetiming disk and turned the latter a slight amount;

This amountof movement is suflicient to'release the end of a spring65carried by the timing disk, and which was previously held close to theface of the disk bya pin 66 mounted upon that partof the frame whichsupports the rock-shaft 59 and projecting beside the disk near the pin61. Upon its release, the end of the spring flies outwardly and engagesthe pin 61, moving arm 60 and gear-segment 52 to the left, disconnectingthe depth feed pawl and allowing the timing pawl to become operative.Thereupon, the depth feed ceases and the cutter is caused to continueits reciprocations in the same location, while the rotary or index feedoperates, turning the cutter and the blank in unison. Through the timingpawl this movement is communicated to the, disk 28, and a camprojection, or rib, 67 upon the latter engages the projection 61 andholds the same away from the disk. By the time the rotary feed mechanismhas given the blank a complete rotation, the end 67? of the cam-rib haspassed pin 61, and the latter has been allowed to move against the faceof the disk, whereupon the timing pawl is thrown out of engagement andthe depth feed pawl again rendered operative, the parts being then inthe position illustrated in Fig. 12.

The operation thus far has resulted in roughing out the gear-blank, theteeth of which are now of somewhat larger dimen- 'sions than is requiredin the finished gear, for the dog 64 is so positioned as to be en gagedand the depth feed disconnected before the cutter has been fedsufficiently far into the work to form the teeth completely. Upon thedepth feed actuator being set in operation the second time, in themanner described, the cutter is fed still farther into the work to takethe finishing cut, and when this out has been made sufficiently deep,the feed is again stopped by the following mechanlsm.

70 is a pin carried by the feed-nut gear 29 having a clutch-member 71which engages the complemental clutch-member 72 when it is pulledout-ward and turned a slight amount, being held in engagement therewithby a spring 73, as shown in Figs. 13,

- 14 and 15,this construction being the same as that described in mypatent, No. 676,227, referred to. The pin 74, carried'by the locking-pinengages a pin 75 mounted upon the frame, when the locking pin 70 hascome opposite the .socket in a bushing 76. Thereby the clutch-membersare rotated and the locking-pin caused to slip into the socket under theaction of spring 73. This not onlylocks the gear 29 and feed-nut 26against further rotation, but it also causes thepawls to be againshifted through the agency of a pin 77, longitudinally movable in theframe and projecting through the bushing Y76, and a bell-crank lever 78which is engaged by the pin and one arm of which is caused to strike apin or stud 79 projecta stud 99 of the timing disk and consists of along, hollow sleeve 7 8 pivoted.

upon a pin 80 and having an arm 78 in position to be struck by thepin77, and a second arm 7 8 which is the one that strikes pin 79. Theparts are so arranged that when the locking-bolt 70 is slipped into itssocket, the link 56 is moved so as to throw out pawl 40 and connect pawl41. This causes the timing disk to be again set inoperation and therotary feed to be continued until the finishing out has been takenentirely about the gear-blank. When this has been done and the blank hasfinished its second complete rotation, a pin 801 upon the timing diskcontacts with the rounded end of a plunger 81 and forces the plungerinward. This plunger has a shoulder 82 which normally is located underthe end 83 of the pin 84 and holdsthelatter elevated so that it isengaged with a portion of the disk 13, which is connected to the loosegear 11, whereby the loose gear and disk are held stationary androtation is given the shaft 12 in the manner described in my previouspat ent. The spring 85v surrounds the pin 84, being located in a socket86, and bears against an internal shoulder 87 of the socket and anexternal shoulder 88 of the pin, tending continually to lower the latterand release it from engagement with the disk. This tendency .is resistedby the projection 82 of plunger 81, which plunger is held outward by aspring 89 which bears against the plunger 90 connected to plunger 81.When, however, the pin 801 carried by the timing disk, forces plunger 81inward, the projection 82 of the latter is moved from under the pin 84and the end 83 thereof is free to slip into a notch 91 of the plunger,and thereby pin 84 is disengaged from the dis t. V

The part of the disk which is engaged by the pin 84 is a stud 92projecting from'a lever 93, pivoted at 94 to the disk and carrying uponits other arm a bell 95. The pres-- sure produced upon disk 13 by thepulley 8 and planetary gear 9 causes stud 92 to bear against theinclined end 96 of pin 84 and to be forced toward the periphery of thedisk, compressing a spring 97 mounted in a socket 97 in lever 93. Uponpin 84 being depressed, the lever 93 is released and spring 97 moves itso as to carry the bell into the path of a striker 98,- carried by thepulley, which upon everyrevolution of the pulley strikes the bell andgives warning to the operator that the blank upon the machine has beencompleted.

is entirely completed, the parts occupy the position shown in Figs. 16and 17, pin 61 of the pawl governor being then engaged by held away lWhen the operation of cutting the teeth the locking bolt 70 to beretracted, and the feed nut 26 to be set by hand to permit a new blankto be inserted. The pin 84 is also depressed whereby disk 13 is allowedto rotate so that friction of the shaft 12 and the parts associatedtherewith prevents the indexing feed of the cutter and blank holder fromtaking place. In order to start the machine, the locking bolt 70 isdisengaged from its socket, the feed nut set in proper position, and thetiming disk 28 turned by the starting lever-100 a suificient distance todisengage projection 99 from pin 61. The starting lever 100 is pivotedon a stud 101 near the plunger 81, and has an arm 102 projectingadjacent pin 801. When the handle portion of the starting lever isgrasped and moved to the right, the arm 102 acts upon pin 801 to movethe timing disk by the required amount, whereupon the pawl controllingpin 61 is released and weight 62 allowed to drop, connecting the depthfeed pawl and disconnecting the timing pawl in the manner alreadydescribed. "The depth feed thereupon is started. Upon raising pin 84 bymeans of a handle 841, the plunger 81 is released and allowed to slipforward under the influence of spring 89, or to be moved manually by ahandle 811. Pin 84 is therefore held elevated so that it will engagestud 92 and arrest disk 13, whereupon the rotary indexing feed willcommence.

In order to enable a gear to be made with a single cut instead of by twodistinct cuts hereinbefore described, I provide means whereby the springpin 63 may be caused .to pass by the dog 64 without engaging it. Byreference to Fig. 13, it will be seen that J this pin is mounted in abushing 631 from which it is normally projected by a spring 632surrounding its shank. The end of the shank projects from the bushingand is threaded, having mounted thereon an adjusting nut 634 and a locknut 635. By adjusting these nuts, the pin can be retracted against thespring sutiicientlyfar into the bushing so that it may pass by the endof dog 64. When the pin is thus retracted, the depth feed nut and gearwill rotate without any interruption until the locking bolt arrives atand slips into itsfsocket 76, but

by that time the complete -depth feed is made, The timing'disk is thenset in operation,- and when the pin 801 comes adjacent plunger .81, theblank has been completely rotated, and the rotary or indexing feed isstopped.-

Inprder to enable the blank to make two complete revolutions when twocuts are taken, and to make only a single revolution when the gear isfinished in a single cut, it is'necessary to provide for driving thetiming disk at diiferent speeds under these conditions.. This is done bygiving the timing disk pawl a variable range of movement.

As shown in. the drawings, the proportions of the cam 51, levers 48 and49, and pawl carrier 46 are such that the pawl 41 is carried, when notarrested, a distance sufiicient to turn the timing ratchet through theangular distance of three teeth, this being the amount required to carrythe timing disk from the startin position of Fig. 6, to the finalposition 0 Fig. 16, while the work holder is being rotated once.

The pawl carrier 46 is provided with a lug 461 which oscillates adjacentto the end of a pin 103. This pin, as shown in Fig. 11*, has anoperating handle 104, and two grooves 105 106 with which a lockingdetent 107 is adapted to cooperate. When the detent is in groove 105,the-end of pin 103 is retracted so that the lug 461 of the timing pawlcarrier may pass by without engagingit. Upon pushing the pin inward sothat the groove 106 is engaged by the detent, however, the end of thepin then projects into thepath of lug 461 and arrests it after thetiming pawl has been retracted only by the space of one tooth on theratchet 33. Thus, at each rotation of the cam 51, the ratchet 33 isrotated only one tooth instead of three, so that two complete rotationsof the work holder must be completedbefore' the timing disk is turnedfar enough to stop the machine. As .there is no positive mechanism forretracting the timing pawl, the stop pin 103 is enabled to limit suchretraction without danger of injury to any of the parts. The detent 107is rounded and pushed against pin 103 by a. spring108, be-

ing thereby enabled to yield and permit the pin to be adjusted whennecessary, while preventing accidental displacement thereof.

When the gear is to be made by a single cut, the pin 103 is retracted,as shown in' Fig. 11*, but when two cuts are to be made, I

it is pushed inward so as to interrupt the motion of pawl carrier 46.Provision is made for adjusting the pin 63 in order to enable a fineregulation for the depth feed to be had by causing the cessation of thisfeed to occur at an earlier or later time. For this purpose, the pin 63is contained in a slot 637 on the wheel 29 as shown in Fig. 5. It may beshifted to either side and clamped, its position being gaged by an indexat the side of the slot. Thus the dog 64 may be engaged by the pin at anearlier .or later time, according as the pin is moved one way or theother in the'slot.

Figs. 20 and .21 illustrate a contrivance, for adjusting the pin 75whiohcauses the release of the feed-nut locking pin 70. As

gages the projection 74. of locking pin 70 may be hastened or retarded.Thus the lockmg pin may be caused to project exactly at the moment whenit comes opposite to its socket in the bushing 76. A screw 751 bearsagainst stud 7 5 and holds its locked in any adjusted position.

From the foregoing description it will be seen that I have provided amachine having the capability of making first a series of roughing cutsequi-distantly spaced about the work, thereby making grooves of lessdepth than required in the finished article, and subsequently, of makinga series of fin- 1shing cuts to complete the grooves produced by theroughing cuts. The finishing cuts are comparatively slight and therebyaccuracy and finish of workmanship is attained. The grooves the sides ofadjacent teeth.

Instead of having two cuts as liereinbefore described, it is obviousthat a plurality of roughing and finishing cuts each carried completelyaround the work may be made, and that mechanism whereby a result of thischaracter may be secured is included within the scope of this invention.

What I claim is:

1. 'A gear generating machine adapted to form the teeth of a gearautomatically in a plurality of series of cuts, comprising a workholder, a planing cutter having a series of gear-shaped teeth, mechanismfor producing a' relative axial movement between the cutter and workholder to cause the former to move across the face of the work,depth-feed mechanism for moving the cutter and work holder-relativelytogether to cause the teeth of the former to progressively enter thework, indexing mechanism for mechanism there producing a simultaneouslateral feed movement of the cutter and work holder at right angles toboth the above-named movements, whereby the forms of gear teeth aregenerated in the work, a timing member, mechanism for operating saidtiming member, and means for simultaneously afl' ting the depth feedmechanism and. timing ihem ber-operating mechanism to make one operativeand the other inoperative, controlled at predetermined times by thedepth mechanism and timing member respectively.

2. In a gear generating machine including a planing cutter and workholder, with depth feed mechanism and lateral feed or, an actuator forsaid dept-h feed mechanism, 'and means. for causmg said actuator tobecome periodically operative and inoperative, comprising a timingmember provided with devices for placing and holding said actuator in aninoperative position, and causing the actuator to become again operativeafter a predetermined extent of movement of said timing megnber,

operative.

3. In a gear generatlng machlne lncludlng produced by'the cuts of courseform and actuating mechanism for the timing member constructed andarranged to be operative when the depth feed actuator is ina planingcutter and depth feed mechanism mechanism therefor, cutter to make firsta and then a series of work holder, with and lateral feed means forcausing the series ofroughing cuts finishing cuts in the work,comprising an actuator for the depth feed mechanism, a timing device forrendering the said actuator nism for driving said timing device insynchronism with the lateral feed mechanism, the latter being formedwith provisions for keeping the actuator inoperative until the roughingcuts are completed and then causing the actuator to becomeoperative,.and means controlled by the depth feed mechanism for againmaking the actuator inoperative.

4. A gear generating machine adapted to form the teeth of a gearautomatically in a plurality of series of cuts, comprising a workholder, a planing cutter having a series of gear-shaped teeth, mechanismfor produclng a relative axial movement between the cutter and workholder to cause the former to move across the face of thework,

depth-feed mechanism for moving the cutter and work holder relativelytogether to cause the teeth of the former to progressively inoperative,mecha-' enter the work, indexing mechanism for producing a simultaneouslateral feed movement of the cutter and work holder at right .angles toboth the above-named movements,

whereby the forms of gear teeth are generated in the work, and means forinterrupt-ing the depth-feed mechanism during a cycle of the indexingmechanism, and subsequently causing it to become operative.

5. A gear-generating machine, comprising a cutter and a work-holder, oneof which has a reciprocatory motion relatively to the other in adirection parallel to the axis thereof, depth-feed mechanism forprogressively moving one toward the other, including an actuator,atiming member actuated first by said depth feed mechanism for disablingthe actuator, indexing feed mechanism for laterally shifting thework-holder and cutter, and mechanism operated by said indexingmechanism for driving the timing" member, the latter being constructedto hol the dept-h feed actuator out of operation for a period andsubsequently cause itto become operative.

6. A gear-generating machine, comprising a cutter, a blank-holder,mechanism for reciprocating the cutter past the edge of the blank, depthand lateral feed mechanisms, a timing member, an actuator thereforoperated by the lateral feed mechanism,and constructed to give astep-by-step progressive movement thereto, an actuator for the depthfeed mechanism, and connections between said actuators for causlng eachin turn to .become inoperative when the other is made operative.

7. A. gear-generating machine, comprising a cutter, a blank-holder,mechanism for reciprocating the cutter past the edge of the blank, depthand lateral feed mechanisms,

a timing member, an actuator therefor operated by the lateral feedmechanism, an actuator 'for the depth feed mechanism, said timing memberbeing constructed and arranged to disconnect the depth feed actuator andsubsequently render the same operative to cause a second actuation ofthe depth feed, and connections between said actuators arranged to throwone of them out of operation when the other is operating, and viceversa.

8. A gear-generating machine, comprising a cutter, a blank-holder,mechanism for re-- ciprocating the cutter past the edge of the blank,depth and lateral feed mechanisms, a timing member, an actuator thereforoperated by the lateral feed mechanism, an actuator for the depth feedmechanism, said timing member being constructed and arranged todisconnect the depth feed actuator and subsequently render the sameoperative to cause a second actuation of the depth feed and devicesoperable by the depth feed for disconnecting and rendering inoperativesaid feed.

9. A gear-generating machine, comprising a gear-shaped cutter, ablank-holder, mechanism for reciprocating the cutter past the edge ofthe blank, depth and rotary feed mechanisms, a timing member, anactuator therefor operated by the rotary feed 'mechanism, an actuatorfor the depth feed mech anism, said timing member being con-1 structedand arranged 'to disconnect the' depth feed actuator and subsequentlyrender.

the same operative to cause a second actuation of the depth feed,connections between said actuators arranged to throw one of them .out ofoperation when the-other is operating, and vice versa; and a trippingdevice for throwing out of operation the rotary feed.

I 10. In a generating machine of the character described, depth andlateral feed mechanisms, a timin member, actuators for said depth feedmec anlsm and tnmng member,

- respectively, and controlled by the timing depth feed actuator.

member, whereby the depth feed actuator is disconnected and againconnected for operation during one cycle of the machine, and connectionsoperated by the depth feed mechanism for finally disconnecting the" 11.In a generating machine of the character described, depth and lateralfeed.

mechanisms, a timing member, actuators for said depth feed mechanism andtiming member, respectively, and controlled by the timing member,whereby the depth feed actuator is disconnected and again connected foroperation during one cycle of the machine, connections operated by thedepth feed mechanism for again disconnecting the depth feed actuator,and a tripping deyicebperated by the timing-member for subsequentlystopping the lateral feed mechanism.

12. In a generating machine of the character described, depth and rotaryfeed mechanisms, a timing member, actuators for said 13. In a machine ofthe character d'escribed, a depth feed screw and nut, a pawl and ratchetactuator for turning the same, a rotary feed for cutter and Work, atiming disk, a pawl and ratchet actuator for rotating the disk operatedby the rotary feed,

provisions on the disk for disconnecting first one and then the otherofthe actuators, connections between said actuators. for disconnectingone when the other is permitted to become operative, and means operatedby said nut for disconnecting the actuator thereof.

14.'In a machine of the character described, a depth feed screw and nut,a pawl and ratchet actuator for turning the same, a rotary feed forcutter and work, a timing disk, a pawl and ratchet actuator for rotatingthe disk operated by the rotary'feed,

provisions on the disk for disconnecting first nections between saidactuators for disconnecting one when the other is permitted to becomeoperative, means operated by said nut for disconnecting the actuatorthereof, and inter-engaging projections on the nut-- and disk,lwherebythe latter may be rotated by the former. I

15. In a machine of the character described, a depth feed screw and nut,a pawl and ratchet actuator for turning the same, a

rotary feed for cutter and work, a timing disk, -a pawl and ratchetactuator for rotating thedisk operated by the rotary feed, atripping-device to disconnect one. of the pawls from, and permit theother to engage with its respective ratchet when, moved in eitherdirection, and connections operated 'one and then the other oftheactuators, conin mesh with said tripping device to disconnect ('me ofthe .depth by-the timing disk for moving said tripping 1 device; 7 16.In a machine of the character described, a depth feed screw and nut, apawl and ratchet actuator for turning the same, a-rotary feed for cutterand work, a timing disk, a pawl and ratchet actuator for rotating thedisk operated by the rotary feed, a

pawls from, and permit the other to engage with its respective ratchetwhen moved in either direction, connections operated by the timing diskfor moving said tripping device,

a locking member carried by the nut and adapted to enter a'socket, andmotion-transmitting connections arranged for operation by said lockingmember and adapted to engage and shift the tripping device.

17. In a machine. of the character described, a depth feed screw andnut, a pawl and ratchet actuator for turning the same, a rotary feed forcutter and work, a timing disk, a pawl and ratchet actuator for rotatingthe disk operated by the rotary feed, a tripping device to disconnectone of the pawls from, and permit the other to engage with itsrespective ratchet when moved in either direction, connections operatedby the timing disk for moving said tripping device, a locking boltcarried by the nut and adapted to enter a socket at the conclusion ofthe feed to hold the nut stationary, and a lever arranged for operationby said bolt and adapted to engage a portion of the tripping device andshift the same.

18. In a machine of the character described, a depth feed screw and nut,a pawl and ratchet actuator for turning the same, a rotary feed forcutter and work, a timing disk, a pawl and ratchet actuator for rotatingthe disk operated by the rotary feed, a trip ing device to disconnectone of the paw s from, and permit the other to engage with itsrespective ratchet when moved in either direction, and connectionsoperated by the timing disk for moving said tripping device, saidconnections consisting of an arm normally held against the disk, and asecond arm connected thereto and in engagement with said trippingdevice.

19. In a machine of the character described, having a rotary cutter andwork spindle and means for feeding the same relatively, a shaft forrotating the said means, driving means for said shaft consisting ofpinions respectively loosely mounted and secured upon said shaft and aplanetary gear pinions and independently driven, a stop for holding saidloose pinion stationary, whereby the shaft is caused to, turn, a timingdisk rotarily driven, and a device operated by said timing disk at theconclusion of the cutting operation for tripping said stop to releasethe loose pinion.

-20. In a machine of the character described, having a rotary cutter andwork spindle, a shaft for rotating the same, driving means for saidshaft consisting of tight and loose pinions and a planetary gear, a stopfor holding said loose pinion station ary, whereby the shaft is causedto turn, a sound-producing device engaged and held inoperative by saidstop, a timing disk rotarily driven, and a device operated by saidtiming disk at the conclusion of the cutting operation for tripping saidstop to release the loose pinion, and to permit said soundproducingdevice to become operative.

21. In a machine of the character described, having a rotary cutter andwork spindle, a shaft for rotating the same, driving means for saidshaft consisting of tight and loose pinions and a planetary gear; a bellmounted on a holder connected with said loose pinion and movable tocarry the bell toward and away from the shaft, a striker movable withthe planetary means tending to move the bell into the path of thestriker, and a stop arranged to engage the bell holder and retain thebell out/ of the path of the striker,-thereby at the same time holdingthe loose pinion from rotation.

22. In a machine of the' character described, having a rotary cutter andwork spindle, a shaft for rotating the same, driving means for saidshaft consisting of tight and loose pinions and a planetary gear, a bellmounted on a holder. connected with said loose pinion and movable tocarry the bell toward and away from the shaft, a striker movable withthe planetary gear, means tending to move the bell into the path of thestriker, a stop arranged to engage the bell holder and retain the bellout of the path of the striker, thereby at the same time holding theloose pinion from rotation, whereby the shaft is caused to turn, atiming disk rotated by the rotary feed, and a device operated by saidtiming disk at the conclusion of the cutting operation for trip pingsaid stop to release the bell holder.

23." In a. machine of the character described, having a rotary cutterand work spindle, a shaft for rotating the same, driving means for saidshaft consisting of tight and loose pinions and a planetary gear, a bellmounted on a holder connected with said'loose pinion and movable tocarry the bell toward and away from the shaft, a striker movable withthe planetary gear, means tending to move the bell into the path of thestriker, a stop arranged to engage the bell holder and retain the bellout'of, the path of the striker, thereby at the same time holding theloose pinion .from rotation, whereby the shaft is caused to turn, a tripfor holding the stop in contact with the bell holder, a timing diskoperated by the rotary feed, and a device carried by said gear,

tive while the other is operative, and pro-.

' sions carried by the nut for moving the disk to cause actuation ofsaid connections.

25. In a machine of the character described, a depth feed screw and nut,means .for rotating said nut, a timing disk, means for rotating saiddisk, connections between said rotating means and under the control ofsaid disk whereby one is made inoperajections carried by the disk andnut arranged to engage during the rotation of the latter to move thedisk and cause actuation of said I connections.

' 26. In a machine of the character described, a depth feed screw andnut, means forrotating said nut, a timing disk, means for rotating saiddisk, connections between said-rotating means and under the control 0 ofsaid disk whereby one is made inoperative while the other is operative,a dog carried by the disk, and a spring pin carried by the nut arrangedto engage the dog during rotat1on of the nut to move the disk andthereby 5 cause actuation of said connections.

27. In a machine of the character described, a depth feed screw and'nut, an

actuator for rotating said nut, a timing disk, an actuator for rotatingsaid disk, connec- 40 tions between said actuators arranged to render'one of them inoperative whenever the other becomes operative, yieldingmeans tending to-retain said actuators in one relation, yielding meanscarried by'the disk 5 for moving them into another relation, and

ing a cutter, a workholder,

. riphery positive holding means on the disk for retaining them in suchsecond relation during part of the rotation of said disk.

28. A gear-generating machine comprismechanism for feeding one towardthe other, mechanism for producing relative lateral movement between thecutter and workholder, whereby to produce a series of grooves upon thepeof the work, and automatic means by the first feeding mechanism for ithe conclusion of such while permitting the said. means being operateddisabling the same at feeding movement,

lateral 'feed to continue,

actuated by-vthe lateral feed mechanism to ing a cutter, a workholder,6'5 an1s m. .for movingone toward the other,

- subsequently cause'the first feeding mechanism to becomeoperative.

29. A gear-generating machine comprisdepth feed mechtogether,

' operations,

lateral feed mechanism for relatively moving the cutter and workholderto cause formation of a series of peripheral grooves on the work, afeed-controlling member adapted to be operated by the lateral feedmechanism when the depth feed is disabled, means operated by the depthfeed mechanism at the conclusion of such feed for disabling the same,and means operated by said controlling member for arresting the lateralfeed upon completion of the work.

I 30. A gear-generating machine comprising a cutter, a workholder, depthfeed mechanism for moving one toward the other, lateral feed mechanismfor relatively moving the cutter and workholder to cause formation of aseries of peripheral grooves 'on the work, a feed-controlling memberadapted to be operated by the lateral feed mechanism when the depth feedis disabled, means operated by the depth feed'mechanism at theconclusion of such feed for disablingthe' same, and adisplaceable'device carried by said depth feed mechanism adapted to beplaced so asto arrest such mechanism and cause operation of saidcontrolling member prior to the operation of said disabling means, saidcontrolling memher having provisions for again causing actuation of thedepth feed mechanism and for stopping the lateral feed after completionof a gear.

31. A gear-generating machine comprising a cutter, a workholder, depthfeed mechanism for moving one toward the other,

lateral feed mechanism for relativelymoving the cutterjand workholder tocause formation of a series of peripheral grooves on the work, afeed-controlling member adapted to be operated by the lateral feedmechanism when the depth feed is disabled,-

means operated by the depth feed mechanism at the conclusion of suchfeed for dis abling the same, a projection carried by the depth feedmechanism adapted to engage said controlling member and set the same inoperation to arrest the depth feed prior to the actuation of saiddisabling means, said projection being capable of displacement so as topass the controlling member'without engagement, and provisionslon thecontrolling member for again setting in operation the depth feedmechanism at the conclusion of a roughing cut.

.32. In a gear cutting machine having means for indexing the cutter.'and work progressively, and continuouslyflduring the cuttingoperations, depth feed mechanism for moving the'cutter and workrelatively means forarresting said depth feed much before the cuttinghas proceeded tothede'pth required in the finished'work,

permit the induring a period suflicient. to dexing mechanism to completea cycle of whereby'a roughing series of cuts may be taken beforecompletion of the work, and means for rendering said arresting meansinoperative.

33. In a gear cutting machine having means for indexing the cutter and.Work progressively and continuously during the cutting operations, depthfeed mechanism for moving the cutter and work relatively together, atiming member constructed to interrupt and arrest the depth feedmechanism before completion of the depth feed,

series of roughing cuts to be made, and means arranged to be madeoperative or inoperative at will for setting said timing member inaction. 7

841. In a gear cutting machine having means for indexing the cutter andwork progressively and continuously during the cutting operations, depthfeed mechanism for moving the cutter and work together, means arrangedfor operation in the first instance by the depth feed mechanism forrendering said mechanism inoperative, to interrupt the depth feed beforecompletion thereof, and mechanism operated by the indexing means forcausing said last named means to permit renewed operation of the depthfeed mechanism, and continuance of such depth feed.

35. In a gear-cutting machine, feeding means for bringing the cutter andwork together, indexing means for presenting diiferent parts of the workto the cutter, a timing member having provisions for causing arrest ofthe feeding means and having a device for stopping the indexing meansupon completion of the work, a device carried by part of the feedingmeans capable of being projected so as to engage the timing member andmove the latter, whereby the feeding means is arrested, an actuator forthe timing member, provisions governed by the timing member for throwingout said actuator and starting the feeding means, and connectionsoperated by said feeding means for disabling the same at the conclusionof the feed and for starting the timing means; the aforesaid devicebeing capable of an inoperative placing whereby the intermediateoperation of the timing member may be avoided.

36. In a gear-cutting machine, feeding and indexing mechanism, a timingmember for governing the operation of said mecha nism, driving mechanismtherefor, a projection carried by the feeding mechanism. for a periodsuflicient to permit a complete 1 adapted to be variously placed so asto pass by or engage and operate the timing memher to produce one or aplurality of indexings' of the work in a single cycle of operations, anddevices for varying the speed at which said driving mechanism actuatesthe timing member, according as the work is indexed once or a pluralityof times.

37. In a gear-cutting machine, feeding and indexing mechanism, a timingmember, a ratchet for operating the same, a pawl for operatingtheratchet, a carrier for advancing and retracting the pawl, and a-stopmovable into the path of said pawl carrier to limit the movement thereofand thereby the rate of speed of the timing member.

38. In a gear-cutting machine, cutterfeeding and blank-indexingmechanism, a timing member, an actuator for the cutterfeeding mechanism,devices on the timing member for causing disconnection of the indexingmember upon completion of the work, and retaining the cutter feedactuator out of operation at the same time, and a starting leverarranged for engagement with the timing member and adapted to bemanually operated to move the lattersufiiciently to release thecutter-feed actuator and permit the same to become active.

In testimony whereof I have affixed my signature, in presence of twowitnesses.

EDIVIN R. FELLOIVS. lVitnesses C. F. BROWN, ARTHUR H. BROWN.

